** Tags removed: ubuntu-17.04
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Title:
Kdump fails to capture dump on Firestone NV when machine crashes while
running stress-ng.
** Tags removed: triage-r
** Tags added: triage-g
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV when machine
This issue was originally raised with 17.04 which is no longer
supported. Could you confirm this is fixed with the Xenial HWE kernel or
the Artful release?
** Changed in: ubuntu-power-systems
Status: Triaged => Incomplete
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** Changed in: ubuntu-power-systems
Status: New => Triaged
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV
** Tags added: ppc64el-kdump
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV when machine
crashes while running
Also, note that I have opened bug LP#1730660 ("Set PANIC_TIMEOUT=10 on
Power Systems"), to handle the PANIC_TIMEOUT option. I have submitted
patches to set that option for Xenial, Zesty, Artful and beyond.
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The kernel being testing is 4.10.0-11-generic, I believe a fix may be in
Ubuntu-4.10.0-15.17 that may address this issue. We've seen this sort
of issue before, e.g. bug 1654073
I believe the pertinent fix is upstream commit:
commit 449809a66c1d0b1563dee84493e14bf3104d2d7e
Author: Eric Dumazet
A null pointer deference is occurring in dccp_v4_ctl_send_reset:
[ 174.691794] Unable to handle kernel paging request for data at address
0x02f4
This is an offset from the pointer in register GRP09, which is zero:
[ 174.695217] GPR08: c01df14a0800 c01e3b60c400
The CPU IPI issue may occurring because of the cpu-online stressor, this
can rapidly turn CPUs offline/online. I suggest re-running the tests
with the '-x cpu-online' option to exclude that stress test to see if
that is causing that specific issue.
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Just one thing to note, running stress-ng as root with all the stressors
is a pathological test scenario. The manual does state:
Running stress-ng with root privileges will adjust out of memory set‐
tings on Linux systems to make the stressors unkillable in low memory
Which version of stress-ng is being used? stress-ng -V will show this
info.
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Title:
Ubuntu 17.04: Kdump fails to capture dump on
Colin, can you look into why stress-ng has crashed this system?
Thanks.
Cascardo.
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Title:
Ubuntu 17.04: Kdump fails to capture
** Tags removed: triage-a
** Tags added: triage-r
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV when machine
** Changed in: ubuntu-power-systems
Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)
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Title:
Ubuntu
** Tags added: kernel-da-key
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV when machine
crashes while running
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)
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Title:
Ubuntu 17.04:
** Changed in: linux (Ubuntu)
Assignee: Nish Aravamudan (nacc) => (unassigned)
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Title:
Ubuntu 17.04: Kdump fails to capture
I believe this request should be routed to the kernel team (setting of a
kernel default value for POWER systems)?
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Title:
Ubuntu
** Tags added: triage-a
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV when machine
crashes while running
** Changed in: ubuntu-power-systems
Importance: Undecided => High
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone
** Tags added: ubuntu-17.04
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Title:
Ubuntu 17.04: Kdump fails to capture dump on Firestone NV when machine
crashes while running
** Changed in: linux (Ubuntu)
Assignee: Taco Screen team (taco-screen-team) => Nish Aravamudan (nacc)
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
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Title:
Ubuntu 17.04: Kdump fails to capture dump
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